1 Topic by slimstar2 (edited by slimstar2 2014-08-21 01:07:37)

  • slimstar2
  • slimstar2
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  • From: North Providence Rhode Island
  • Registered: 2014-03-28
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Topic: Upgraded bed heater

Solidset SD3 hi power bed heater on EBay

I just bought one of these for my SD3. Wow  what a difference  . Heats to 105 C  in 4 minutes  and 10 seconds . much better than  the 15 minutes it used to take  the bed temps are much more even across the whole bed . It was easy to mount and moving the holes over took all of 1 minute. I use a separate power supply for the heaters set to 14.5 volts and capable of providing 30 amps . I also use an independent monitor that I built to double check temps ,voltages and amp draws. My original heater  pulled 2.9 amps the new one pulls 7.5 amps . for $21.00 + $4.99 shipping ,this was a great upgrade . The link to my monitor is  https://tinkercad.com/things/g1vFJBOX838  from there you can find it on Thingiverse also , just search solidoodle  or monitor. I use an automotive type 20 amp relay ( I like to heard it click occasionally so I know all is well ) just by listening. I do use an SSR for the extruder heater. I mounted power supplies under case to keep footprint small.

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SD3, RAMPS 1.4, Lawsy's carriages modified by me, 2 SSRs, E3D V6, 2 Power supplies, Independent monitoring of both power supplies (amps and volts) also extruder and bed temps, Blue Tooth connectivity, bearings in all axis & rotational points, Y axis direct drive.  Remotely controlled power box on / off . Gecko Tec build plate . Renamed FrankenDoodle

2 Reply by elmoret

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Re: Upgraded bed heater

2.9 amps doesn't seem right - that'd be 36 watts. I measured the SD2 bed at 3.8 amps, and a SD3 has almost twice the area so I'd expect north of 7 amps.

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3 Reply by slimstar2

  • slimstar2
  • slimstar2
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Re: Upgraded bed heater

I use 2 inline amp meters 1 for the heaters and 1 for the rest of the electronics. 2.9 amps was correct with the old bed heater .
That is probably why it it took 20 minutes or more to heat up and why the edges where 50 degrees F cooler than the middle of the bed . New heater heats  bed up to temperature in under 5 minutes and edge temp is within 10 degrees of center. It does pull between 6.2 and 7.2 amperes . I wish I had done this upgrade earlier. As we speak it is 2/3 done with my 1 st large area print with new heater (4 x 6 inch , 6 hour print) . I am also trying hairspray on glass instead of my usual ABS slurry. No lifting of the edges so far. This was most likely my  problem from the start.

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You don't have the permssions to download the attachments of this post.
SD3, RAMPS 1.4, Lawsy's carriages modified by me, 2 SSRs, E3D V6, 2 Power supplies, Independent monitoring of both power supplies (amps and volts) also extruder and bed temps, Blue Tooth connectivity, bearings in all axis & rotational points, Y axis direct drive.  Remotely controlled power box on / off . Gecko Tec build plate . Renamed FrankenDoodle